Quarter	Billions of US Dollars
1991-04-01	-0.07230
1993-04-01	0.12000
1993-10-01	0.05000
1994-01-01	0.20000
1994-10-01	0.10000
1995-04-01	0.05000
1995-07-01	0.05000
1995-10-01	-0.00280
1996-04-01	0.12956
1996-07-01	0.44475
1996-10-01	0.00063
1997-01-01	-0.10750
1997-04-01	0.04391
1997-07-01	0.43432
1997-10-01	-0.02366
1998-01-01	0.17846
1998-04-01	0.41838
1998-07-01	1.08964
1998-10-01	-0.08558
1999-01-01	-0.34136
1999-04-01	-0.00753
1999-07-01	0.01129
1999-10-01	0.03568
2000-01-01	-0.06335
2000-04-01	-0.04333
2000-07-01	-1.40830
2000-10-01	-0.04827
2001-01-01	-0.04543
2001-04-01	0.04916
2001-07-01	0.61222
2001-10-01	-0.01707
2002-01-01	-0.46746
2002-04-01	0.00422
2002-07-01	0.00126
2002-10-01	0.19513
2003-01-01	0.20194
2003-04-01	0.32238
2003-07-01	0.58809
2003-10-01	0.04349
2004-01-01	-0.60409
2004-04-01	-0.34747
2004-07-01	-0.40193
2004-10-01	0.06368
2005-01-01	-0.04390
2005-04-01	-0.25522
2005-07-01	-0.07433
2005-10-01	-0.31667
2006-01-01	0.23179
2006-04-01	0.02867
2006-07-01	0.00547
2006-10-01	0.79040
2007-01-01	0.51954
2007-04-01	0.03380
2007-07-01	0.01050
2007-10-01	0.31446
2008-01-01	1.74757
2008-04-01	0.58783
2008-07-01	0.02347
2008-10-01	-0.20436
2009-01-01	-0.08714
2009-04-01	-0.39325
2009-07-01	0.79252
2009-10-01	2.77861
2010-01-01	0.88205
2010-04-01	2.37621
2010-07-01	1.63912
2010-10-01	0.21855
2011-01-01	2.46090
2011-04-01	1.07926
2011-07-01	0.04359
2011-10-01	-0.18334
2012-01-01	0.94050
2012-04-01	0.71750
2012-07-01	0.07122
2012-10-01	0.16204
2013-01-01	-1.10114
2013-04-01	2.00000
2013-07-01	-0.06540
2013-10-01	0.03050
2014-01-01	0.20000
2014-04-01	0.22500
2014-07-01	0.18599
2014-10-01	-1.67147
2015-01-01	-0.04321
2015-04-01	-0.39600